> Can anyone tell me how is exactly this going to work out? Not to mention all the "expats" and "digital nomads" that are willing to pay whatever the landlord says because they really really want to live here without thinking about the consequences, but that's another story.

Slowly, more regulation is added to get the problem somewhat under control. Rents capped by index, annual rent increases cap, introduction of "tense housing markets", new upkeep for vacant properties, bonuses for renting out to younger people and more are being introduced, at least here in Catalunya. Unsure exactly what of those things are on the national level but guessing something similar is being introduced elsewhere in the country if it isn't already.